Well, for me it's Kaname. I think he is the real baddie of the story. At least with rido you know that he is rotten to the core, but with kaname, it's more of a wolf in a beautiful sheeps clothing. egostic, manipulative, meddling and always wants attention. me and me me me! Yeah. he always annoyes me as a character and disgusts me with his ways to make yuuki feels guilty if she ever decides to leave him for zero and with that he said in the manga like I "prefer to be killed by you if you leave me" he is acting selfish, he knows very well that yuuki is longed for zero, and a chunk of her heart is attached to him, yet he is still wanting to keep her for himself and not letting her freely make her own choice. this is a very selfish behaviour. he thinks he knows what love is....some one needs to point out to him that REAL LOVE is to be happy if your beloved one is happy, even if his happiness is with some one else.